Yes if you are able to make a site and put your work and sample on the site and also contact the people you did work for and have them write just a simple credibility that will help.
We have a site and when I send an email out I have that for my signature. You would not believe the traffic we get from the signature and when you bid on freelancer, always end your pm with that ....like mine is
Rhonda t-73softdesign. Now I know you are not allowed to do the
www.youstite.com but if you put the relevant thing in a person that really knows what they are doing can figure out that and will look at your site and make a portfolio on the site ....and a blog or as we have a menram, with an rss feed this really works, we done this since Sept and have gotten more better projects and projects from people looking and that do not know about get a freelancer....